/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *	  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */

package org.jboss.el.parser;

@SuppressWarnings("serial")
public class TokenMgrError extends Error
{
   /*
	* Ordinals for various reasons why an Error of this type can be thrown.
	*/

   /**
	* Lexical error occured.
	*/
   static final int LEXICAL_ERROR = 0;

   /**
	* An attempt wass made to create a second instance of a static token manager.
	*/
   static final int STATIC_LEXER_ERROR = 1;

   /**
	* Tried to change to an invalid lexical state.
	*/
   static final int INVALID_LEXICAL_STATE = 2;

   /**
	* Detected (and bailed out of) an infinite loop in the token manager.
	*/
   static final int LOOP_DETECTED = 3;

   /**
	* Indicates the reason why the exception is thrown. It will have
	* one of the above 4 values.
	*/
   int errorCode;

   /**
	* Replaces unprintable characters by their espaced (or unicode escaped)
	* equivalents in the given string
	*/
   protected static final String addEscapes(String str) {
	  StringBuffer retval = new StringBuffer();
	  char ch;
	  for (int i = 0; i < str.length(); i++) {
		switch (str.charAt(i))
		{
		   case 0 :
			  continue;
		   case '\b':
			  retval.append("\\b");
			  continue;
		   case '\t':
			  retval.append("\\t");
			  continue;
		   case '\n':
			  retval.append("\\n");
			  continue;
		   case '\f':
			  retval.append("\\f");
			  continue;
		   case '\r':
			  retval.append("\\r");
			  continue;
		   case '\"':
			  retval.append("\\\"");
			  continue;
		   case '\'':
			  retval.append("\\\'");
			  continue;
		   case '\\':
			  retval.append("\\\\");
			  continue;
		   default:
			  if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
				 String s = "0000" + Integer.toString(ch, 16);
				 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
			  } else {
				 retval.append(ch);
			  }
			  continue;
		}
	  }
	  return retval.toString();
   }

   /**
	* Returns a detailed message for the Error when it is thrown by the
	* token manager to indicate a lexical error.
	* Parameters : 
	*	EOFSeen	 : indicates if EOF caused the lexicl error
	*	curLexState : lexical state in which this error occured
	*	errorLine   : line number when the error occured
	*	errorColumn : column number when the error occured
	*	errorAfter  : prefix that was seen before this error occured
	*	curchar	 : the offending character
	* Note: You can customize the lexical error message by modifying this method.
	*/
   protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
	  return("Lexical error at line " +
		   errorLine + ", column " +
		   errorColumn + ".  Encountered: " +
		   (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
		   "after : \"" + addEscapes(errorAfter) + "\"");
   }

   /**
	* You can also modify the body of this method to customize your error messages.
	* For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
	* of end-users concern, so you can return something like : 
	*
	*	 "Internal Error : Please file a bug report .... "
	*
	* from this method for such cases in the release version of your parser.
	*/
   public String getMessage() {
	  return super.getMessage();
   }

   /*
	* Constructors of various flavors follow.
	*/

   public TokenMgrError() {
   }

   public TokenMgrError(String message, int reason) {
	  super(message);
	  errorCode = reason;
   }

   public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
	  this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
   }
}
